Additional stock-based compensation expenses related to separation and acceleration vesting

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Employee stock purchase plan offering period

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Employee Stock Purchase Plan Purchase Periods

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Number of executives employment terminated

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Restricted stock unit equal to number of common stock share.

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Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans for which Shareholder Approval Not Required

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Share-based Compensation Arrangement by Share-based Payment Award, Number of Shareholder Approved Stock Plans

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Stock Swap

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Shares available and reserved for issuance under employee stock purchase plan

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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Price of a single share of a number of saleable stocks of a company.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
Stock-Based Compensation (Narrative) (Details) (USD $)	Nov. 30, 2014 Executives plan	Nov. 30, 2013	Nov. 30, 2012 Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shareholder approved stock plans	1
Number of plans for which shareholder approval not required	2
Closing stock price on November 30, 2014	$ 25.79us-gaap_SharePrice
Options included in stock-swap	46,000
Exercise of stock options, shares	690,000
Unrecognized stock-based compensation expense, net of expected forfeitures	$ 17,300,000
Costs are expected to be recognized, weighted average period	1 year 8 months 12 days
Number of executives whose employment was terminated	2		3
Additional stock-based compensation expenses related to separation and acceleration vesting	1,200,000		1,800,000
Stock-based compensation	24,873,000	21,399,000	28,233,000
2008 Stock Option And Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable under stock plans (in shares)	47,010,000
Shares available for grant under stock plans (in shares)	7,840,978
2002 Nonqualified Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable under stock plans (in shares)	9,750,000
Shares available for grant under stock plans (in shares)	840,058
2004 Inducement Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable under stock plans (in shares)	1,500,000
Shares available for grant under stock plans (in shares)	583,021
Stock Options Granted Prior To Fiscal 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	10 years
Stock Options Granted From Fiscal 2005 Through Fiscal 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	7 years
Stock Options Granted In 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	7 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable under stock plans (in shares)	8,650,000
ESPP offering period	27 months
ESPP number of purchase periods	9
ESPP purchase price	85.00%
Employee stock purchase plan, issued shares (in shares)	203,000	281,000	376,000
Weighted average purchase price of shares (in dollars per share)	$ 17.84	$ 15.28	$ 15.04
Shares available and reserved for issuance (in shares)	727,000
Weighted average estimated fair value of options granted, per share (in dollars per share)	$ 6.93	$ 6.88	$ 6.53
General And Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional stock-based compensation expenses related to separation and acceleration vesting	500,000		900,000
Stock-based compensation	14,330,000	10,186,000	10,983,000
Sales And Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional stock-based compensation expenses related to separation and acceleration vesting	700,000		900,000
Stock-based compensation	4,642,000	3,599,000	3,274,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	4 years 9 months 18 days	4 years 9 months 18 days	4 years 9 months 18 days
Weighted average estimated fair value of options granted, per share (in dollars per share)	$ 5.95	$ 6.08	$ 5.66
Stock Options [Member] \| Stock Options Granted Prior To Fiscal 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Stock Options [Member] \| Stock Options Granted From Fiscal 2005 Through Fiscal 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Stock Options [Member] \| Stock Options Granted In 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock-based compensation service period	3 years
Number of common stock shares each restricted stock unit represents (in shares)	1
Accelerated Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 1,400,000	$ 1,300,000